Rhododendron boninense (ムニンツツジ, Munin-tsutsuji) is a species of flowering plant in the family Ericaceae that is endemic to the Bonin Islands of Tōkyō Metropolis, Japan.

[1][2] The species was first described by Japanese botanist Takenoshin Nakai in 1920.

[1] The specific epithet relates to the type locality in the Bonin (Munin) Islands.

[4][5] Rhododendron boninense is classed as Critically Endangered on the Ministry of the Environment Red List and has been designated a National Endangered Species under the 1992 Act on Conservation of Endangered Species of Wild Fauna and Flora.

[6][7][8] According to the Red Data Book Tokyo, it is threatened by competition with exotic plants and browsing by introduced goats.